No matter, if checking ourselves for flaws to work on, or trying to understand our fellow humans: The video mentions some useful basics without being too `psychology-student trying to monetize a video that Wikipedia already did better´.  😉

I learned to love my blogger. 

For authors and game developers, it is mostly about designing villains we all can fear, loathe, despise. Bu, for some of us, it goes beyond self-defense and protection of interests, as they actually prey on their fellow humans while pretending to be friendly, loyal, legitimate types of persons themselves.   😉

On the honest side of life, most of us also have one or two of such habits & aspects ourselves.  😎